linux-kernel - Re: [PATCH 0/2] riscv: Fix race conditions in PR_RISCV_SET_ICACHE_FLUSH

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Message-Id: 
 <172606863202.959689.8576514936896750298.git-patchwork-notify@kernel.org>
Date: Wed, 11 Sep 2024 15:30:32 +0000
From: patchwork-bot+linux-riscv@...nel.org
To: Charlie Jenkins <charlie@...osinc.com>
Cc: linux-riscv@...ts.infradead.org, paul.walmsley@...ive.com,
 palmer@...belt.com, aou@...s.berkeley.edu, alexghiti@...osinc.com,
 atishp@...osinc.com, samuel.holland@...ive.com, parri.andrea@...il.com,
 palmer@...osinc.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] riscv: Fix race conditions in
 PR_RISCV_SET_ICACHE_FLUSH_CTX

Hello:

This series was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer@...osinc.com>:

On Tue, 13 Aug 2024 16:02:16 -0700 you wrote:
> There are two race conditions possible with
> PR_RISCV_SET_ICACHE_FLUSH_CTX. The first one can be seen by enabling
> DEBUG_PREEMPT and using this prctl which will warn with BUG: using
> smp_processor_id() in preemptible. This can be fixed by disabling
> preemption during this prctl handling. Another race condition is present
> when the mm->context.icache_stale_mask is changed by a thread while a
> different thread in the same mm context is between switch_mm() and
> switch_to() during a context switch.
> 
> [...]

Here is the summary with links:
  - [1/2] riscv: Disable preemption while handling PR_RISCV_CTX_SW_FENCEI_OFF
    https://git.kernel.org/riscv/c/7c1e5b9690b0
  - [2/2] riscv: Eagerly flush in flush_icache_deferred()
    (no matching commit)

You are awesome, thank you!
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